US4506682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clear tobacco aroma oil, a process for obtaining it from a tobacco extract, and its use
Assignee: Individual
•
Filing: 1982-12-01
•
Granted: 1985-03-26
•
Expires: 2002-12-01
Abstract
Abstract The invention relates to a process for obtaining aromatic materials from a tobacco extract (primary extract) obtainable by means of solvents, by mixing this tobacco extract with an adsorbent, treating the mixture obtained with CO 2 in a pressure extraction vessel under extraction conditions (secondary extraction) and isolating a clear tobacco aroma oil in a downstream separating vessel. The invention also relates to a new tobacco aroma oil which is free of resins, waxes and polyphenols and has a considerably reduced nicotine content. The invention further relates to the use of the obtainable tobacco aroma oil for aromatizing tobacco or tobacco products.
Inventors
- 👤 Adam Muller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:47
CPC Classifications
A; A24; A24B; A24B15/00; A24B15/18; A24B15/24
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
78 words
A process for obtaining aromatic materials from a tobacco extract, which comprises mixing a tobacco extract, which is obtained by extraction of tobacco with a solvent (primary extract), with an adsorbent, subjecting this mixture to a secondary extraction with CO 2 in a sealed pressure vessel (extraction vessel), and isolating in a second sealed pressure vessel (separating vessel) a clear tobacco aroma oil which can readily be separated from resins and waxes and has a reduced nicotine content.
Claim 2
Dependent Claim
78 words
A process for obtaining aromatic materials from a tobacco extract, which comprises mixing a tobacco extract, which is obtained by extraction of tobacco with a solvent (primary extract), with an adsorbent, subjecting this mixture to a secondary extraction with CO 2 in a sealed pressure vessel (extraction vessel), and isolating in a second sealed pressure vessel (separating vessel) a clear tobacco aroma oil which can readily be separated from resins and waxes and has a reduced nicotine content.
Claim 3
Dependent Claim
41 words
A process according to claim 1, wherein the solvent used for preparing the primary extract is benzene, toluene, methanol, ethanol, n-propanol, methylethyl acetate, diethyl ether, acetone, propane, n-hexane, cyclohexane, petroleum ether, dichloromethane, trichloromethane or mixtures of these solvents or carbon dioxide.
Claim 4
Dependent Claim
32 words
A process according to claim 1, wherein the adsorbent used in the secondary extraction is magnesium oxide, activated carbon, alumina, sodium aluminosilicate, bleaching earth, bentonite, silica gel, kieselguhr or zeolitic molecular sieves.
Claim 5
Dependent Claim
19 words
A process according to claim 1, wherein the ratio of primary extract to adsorbent is from 1:0.1 to 1:10.
Claim 6
Dependent Claim
40 words
A process according to claim 1, wherein the secondary extraction with CO 2 in said extraction vessel is carried out under supercritical pressure and temperature conditions, under subcritical pressure and temperature conditions or under supercritical pressure and subcritical temperature conditions.
Claim 7
Dependent Claim
25 words
A process according to claim 1, wherein the separating vessel is at subcritical pressure and temperature conditions during the secondary extraction with CO 2 .
Claim 8
Dependent Claim
28 words
A process according to claim 1, wherein a tobacco aroma oil is isolated having a nicotine content of 5 to 50% of the nicotine content of said tobacco.
Claim 9
Dependent Claim
100 words
A process according to claim 1, wherein to reduce the nicotine content in the tobacco aroma oil to 5 to 10% of the nicotine content of said tobacco, the secondary extraction with CO 2 is carried out in two stages: a. a first extraction stage with CO 2 at a temperature of -25° C. to +5° C. under a pressure of about 20 to 25 bar in the extraction vessel, and b. a second extraction stage with CO 2 by subsequently increasing the pressure and temperature in the extraction vessel to more than 25 bar and more than 5° C.
Claim 10
Dependent Claim
18 words
A process according to claim 8, wherein the separating vessel is held under subcritical pressure and temperature conditions.
Claim 11
Dependent Claim
21 words
A process according to claim 1, wherein the secondary extraction with CO 2 is carried out for 0.5 to 8 hours.
Claim 12
Dependent Claim
28 words
A process according to claim 1, wherein CO 2 in the secondary extraction is used at a rate of 0.3 to 35 kg/hour per kg of said tobacco.
Claim 13
Dependent Claim
39 words
A process according to claim 1, wherein the product isolated in the secondary extraction in the separating vessel is separated by filtration into resins and waxes on the one hand and clear tobacco aroma oil on the other hand.
Claim 14
Dependent Claim
39 words
A process according to claim 8, wherein the product isolated in the secondary extraction in the separating vessel is separated by filtration into resins and waxes on the one hand and clear tobacco aroma oil on the other hand.
Claim 15
Dependent Claim
32 words
Clear tobacco aroma oil, obtained from tobacco, essentially free from polyphenols, resins and waxes, and having a nicotine content of 5 to 50% by weight of the nicotine content of said tobacco.
Claim 16
Dependent Claim
32 words
Clear tobacco aroma oil, obtained from tobacco, essentially free from polyphenols, resins and waxes, and having a nicotine content of 5 to 50% by weight of the nicotine content of said tobacco.
Claim 17
Dependent Claim
14 words
The oil according to claim 14, having the tobacco smell typical of said tobacco.
Claim 18
Dependent Claim
35 words
A composition comprising the tobacco aroma oil obtained according to claim 1, and a material selected from the groups consisting of tobacco, tobacco products, carrier materials for tobacco or tobacco products and tobacco adhesive materials.
Claim 19
Dependent Claim
34 words
A composition comprising the tobacco aroma oil according to claim 14, and a material selected from the group consisting of tobacco, tobacco products, carrier materials for tobacco or tobacco products, and tobacco adhesive materials.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-03-25 | 1988-09-24 | 1989-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-25 | 1992-09-24 | 1993-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-25 | 1996-09-24 | 1997-03-26 | $7700.00 | Window Closed / Lapsed |